High-capacity ink cartridges are great for high-volume printing. DuraBrite Ultra Inks offer superior image quality with smudge-resistance, water-resistance and fade-resistance for durable prints. Ideal for double-sided printing, DuraBrite Ultra inks do not bleed through. Ink is also quick-drying for worry-free handling of photos. Patented SmartValve Cartridge Technology with MicroPiezo Ink Level Sensors delivers reliable printing. Ink cartridge is designed for use with Epson Stylus Workforce 30, 40, 310, 315, 500, 600, 610, 615 and 1100. Each cartridge yields approximately 370 pages.